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›› 2013, Vol. 13 ›› Issue (2): 241-245.

• 过程与工艺 • 上一篇    下一篇

铝厂污泥对低灰熔点气化型煤熔融特性的影响规律

林华锋 林荣英 林博 郑福宝   

  1. 福州大学化学工程与技术研究所 福州大学化学工程与技术研究所 福州大学化学工程与技术研究所 福州大学化学工程与技术研究所
  • 收稿日期:2013-01-22 修回日期:2013-03-20 出版日期:2013-04-20 发布日期:2013-04-20
  • 通讯作者: 林华锋

Effect of Aluminum Plant Waste Slag on the Melting Characteristics of Gasification Briquette with Low Ash Fusion Temperature

LIN Hua-feng LIN Rong-ying LIN Bo ZHENG Fu-bao   

  1. Institute of Chemical Engineering and Technology, Fuzhou University Institute of Chemical Engineering and Technology, Fuzhou University Institute of Chemical Engineering and Technology, Fuzhou University Institute of Chemical Engineering and Technology, Fuzhou University
  • Received:2013-01-22 Revised:2013-03-20 Online:2013-04-20 Published:2013-04-20
  • Contact: LIN Hua-feng

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摘要： 研究了铝厂污泥在弱还原气氛下对福建建兴矿煤(JX)、永安矿煤(YA)和创宏矿煤(CH)熔融特性的影响，考察了添加铝厂污泥前后JX煤灰在不同热处理温度下的矿物组成变化. 结果表明，JX煤灰熔点低是1000℃以上形成低温共熔物引起的；加入铝厂污泥作为阻熔剂可提高JX煤灰的熔融温度，添加量达6%(w)时(以煤灰基计)，可使JX煤灰软化温度提高到1250℃以上，满足气化炉固态排渣对灰熔点的要求；加入阻熔剂后，在1000℃以上JX煤灰内形成了莫来石，莫来石在灰渣中起骨架作用，并延缓低温共熔物形成，从而提高了灰熔点.

关键词: 灰熔融特性, 低灰熔点煤, 铝厂污泥, 低温共熔物

Abstract: The effect of aluminum plant waste slag on the melting characteristic of Fujian Jianxing coal (JX), Yongan coal and Chuanghong coal with low ash fusion temperature was studied under the mild reducing atmosphere. The change of mineral compositions under various temperatures before and after addition of the waste slag into JX was examined by XRD and SEM-EDX. The results show that low-temperature eutectic mixtures formed over 1000℃ is the major reason for low ash fusion temperature of JX. The coal ash fusion temperature is obviously increased by adding the waste slag .While the added mass of waste slag is 6% (ash as reference), the ash softening temperature (ST) of JX can be increased to over 1250℃ to meet the ash fusion temperature requirements of the gasifier solid deslagging process. Adding the waste slag, mullite phase forms in JX ash above 1000℃. The mullite phase plays a skeleton effect on ash, and delays the formation of low-temperature eutectic mixtures, thereby improving the ash melting point.

Key words: melting characteristic, coal with low ash fusion temperature, aluminum plant waste slag, low-temperature eutectic mixture

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